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On Thu, 29 Feb 1996, Frederic Badier wrote:

> Dennis,
> 
> Thanks for the info on the Fieno rebreather FO2. It seems that you are on
> the border line for hypoxia. I wonder if the hypoxia symptoms that you
> described are also noticable in depth? I always thought that hypoxia cannot
> be detected prior to black out.

we have pushed the units at 100 fsw with no signs as far as we could tell,
when i told dr bill about doing this he said "you shouldn't be doing that",
he had tested the units in a chamber and knew thier limits.  i respect him
totally and will not do that again until the sensors are installed.

> 
> In depth with partial pressure effect, the FO2 can probably go even lower
> without noticing the symptom. May be you shoud carry out your tests with a
> Nitrox 60% for safety reason then you substract 20% to your results ;-) 
> 
> Thanks again for being unbiaised.
> 

yep, your welcome, i was suprized at how quickly we went hypoxic, i'd like
to run the same tests on the drager and other units.

dp


> Frederic
> 
> 

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